# import datetime

# # 先构造 datetime 变量
# date1 = datetime.datetime(2021,12,6)
# date2 = datetime.datetime(2025,3,23)
# print(date2-date1)


# from datetime import datetime

# date1 = datetime(2021,12,6)
# date2 = datetime(2025,3,23)

import datetime as dt
date1 = dt.datetime(2021,12,6)
date2 = dt.datetime(2025,3,23)